JP7246694B2

JP7246694B2 - motor

Info

Publication number: JP7246694B2
Application number: JP2019002432A
Authority: JP
Inventors: 尚久小柳; 伊吹黒澤
Original assignee: Tokyo Parts Ind Co Ltd
Current assignee: Tokyo Parts Ind Co Ltd
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2023-03-28
Anticipated expiration: 2039-01-10
Also published as: CN111431314B; JP2020114083A; CN111431314A

Description

本発明は、コアと巻線の間に絶縁材としてコアカバーを用いているモータに関する。 The present invention relates to a motor using a core cover as an insulating material between the core and the windings.

この種のモータとしては、中心軸の周囲に配置されたロータ部もしくはステータ部となるコアと、コアに巻きまわされた巻線と、絶縁の目的でコアと巻線の間にコアカバーが設けられている構造を有しているものがある。 A motor of this type consists of a core, which serves as a rotor or stator arranged around a central axis, windings wound around the core, and a core cover provided between the core and the windings for the purpose of insulation. Some have a structure that is

従来例でのコアおよびコアカバーの構成を図１３に示す。コア８０は中心軸８１周辺から径方向に向かって放射状に延びた複数の極歯８２と、極歯８２の先端から円周方向に伸びた鍔部８３を備えている。コアカバー９０は樹脂成形品からなり、極歯８２の間に挿入される挿入部９１を有していて、この挿入部９１が中心被覆部９２、極歯被覆部９３、鍔被覆部９４となっている。鍔被覆部９４の端辺９４ａは鍔部端辺８３ａと平行で略同一の位置にある。 FIG. 13 shows the configuration of the core and core cover in the conventional example. The core 80 has a plurality of pole teeth 82 radially extending from the periphery of the central axis 81 and flanges 83 extending circumferentially from the tips of the pole teeth 82 . The core cover 90 is made of a resin molded product and has an insertion portion 91 inserted between the pole teeth 82 . ing. An end side 94a of the collar covering portion 94 is parallel to and substantially at the same position as the collar portion end side 83a.

一方、特許文献１に記載のボビンは、ロータもしくはステータに挿入する挿入部の先端に挿入方向直角面に対して斜めカットした導入部を設けている。そのため、ボビンに変形がある場合でもロータ及びステータへの係合が容易に行え、モータの組み立て時間が短縮化できるとされている。 On the other hand, the bobbin described in Patent Document 1 has an introduction section that is cut obliquely with respect to a plane perpendicular to the insertion direction at the tip of the insertion section that is inserted into the rotor or stator. Therefore, even if the bobbin is deformed, the rotor and the stator can be easily engaged, and the motor assembly time can be shortened.

特許文献２に記載のインシュレーターは、磁極歯とスロット内壁面を覆うインシュレーターにスロット入口側端部の差込み長さが短くなるように傾斜した切欠き部を設けている。そのため、複数のスロットにインシュレーターの各差込み部を同時に円滑に差し込むことができ、インシュレーターの取り付け作業性が向上し、インシュレーターの変形も防ぐことができるため絶縁性の向上にも寄与するとされている。 In the insulator disclosed in Patent Document 2, the insulator covering the magnetic pole teeth and the inner wall surface of the slot is provided with an inclined notch so that the insertion length of the slot inlet side end is shortened. Therefore, it is possible to smoothly insert each insertion part of the insulator into multiple slots at the same time, which improves the workability of installing the insulator and prevents deformation of the insulator, which is said to contribute to the improvement of insulation.

実開平６-８０３５１号公報Japanese Utility Model Laid-Open No. 6-80351 特開２００３－８８０２９号公報JP-A-2003-88029

しかしながら、従来例および特許文献１に記載のコアカバー（ボビン）では、コアの鍔部を被覆している部分が鍔部の端辺と平行かつ略同一の位置にあるため、鍔部内壁とコアカバーの間に生じた段差あるいは隙間に巻線が引っかかってしまったり、巻線を巻き込んでボビンがめくれてしまう可能性がある。また、特に小型のモータでは、ボビンは0.5mm以下といった薄肉で成型されているため可撓性が大きく、成型時およびコアへの挿入時にボビンに変形やめくれを生じ、その場合さらに巻線を巻き込みやすくなるという問題点がある。 However, in the conventional example and the core cover (bobbin) described in Patent Document 1, since the portion covering the flange of the core is parallel to and substantially at the same position as the edge of the flange, the inner wall of the flange and the core There is a possibility that the winding may get caught in the steps or gaps between the covers, or the winding may get caught and the bobbin may be turned up. In addition, especially in small motors, the bobbin is molded with a thickness of 0.5 mm or less, so it is highly flexible. The problem is that it becomes easier.

また、特許文献２に記載されたインシュレーターは、スロット入口側に切欠きを設けているため巻線を巻き込む可能性は低くなるものの、インシュレーターが覆う箇所が磁極歯にとどまっているため、コアに磁極歯先端から円周方向に伸びた鍔部がある場合、コアの鍔部と巻線が直接接触してしまい、鍔部と巻線間に絶縁不良が生じる可能性があるという問題点がある。 In addition, the insulator described in Patent Document 2 has a notch on the slot entrance side, which reduces the possibility that the winding will be caught in the winding. If there is a flange portion extending in the circumferential direction from the tip of the tooth, there is a problem that the flange portion of the core and the winding may come into direct contact with each other, resulting in poor insulation between the flange and the winding.

そこで、本発明は、巻線のコアカバーへの引っかかりおよび巻き込みをなくして、生産性および絶縁性を高めたモータを提供するものである。 SUMMARY OF THE INVENTION Accordingly, the present invention provides a motor with improved productivity and insulating properties by eliminating the entanglement and entanglement of the windings in the core cover.

本発明の一実施態様は、
中心軸の周囲に配置されたロータ部もしくはステータ部となるコアと、前記コアに巻回された巻線と、前記コアと前記巻線との間に配置されたコアカバーと、を有するモータにおいて、
前記コアは、前記中心軸を覆うように形成された中心部と、前記中心部から径方向に向かって放射状に延びた複数の極歯と、前記極歯先端から円周方向に延びた鍔部を備え、
前記巻線は、前記極歯に巻回されており、
前記コアカバーは、前記極歯間に形成されたスロットに挿入される挿入部を有し、
前記挿入部は、前記中心部を被覆する中心被覆部と、前記極歯を被覆する極歯被覆部と、前記鍔部を被覆する鍔被覆部を有し、
前記鍔部を被覆する前記鍔被覆部のスロット開口部側の円周方向端辺は、当該鍔被覆部のスロット開口部側の上辺の端点よりも、円周方向において、常に当該鍔部に接する前記極歯側にあることを特徴とするものである。
One embodiment of the present invention is
A motor having a core serving as a rotor portion or a stator portion arranged around a central axis, windings wound around the core, and a core cover arranged between the core and the windings ,
The core includes a central portion formed to cover the central axis, a plurality of pole teeth radially extending from the central portion, and a flange extending circumferentially from the tip of the pole tooth. with
The winding is wound on the pole tooth,
The core cover has an insertion portion inserted into a slot formed between the pole teeth,
The insertion portion has a center covering portion that covers the center portion, a pole tooth covering portion that covers the pole teeth, and a flange covering portion that covers the flange portion,
The circumferential edge of the flange covering portion on the slot opening side that covers the flange portion is always in contact with the flange portion in the circumferential direction, rather than the end point of the upper side of the flange covering portion on the slot opening side. It is characterized by being on the pole tooth side.

本発明の他の実施態様は、
ロータ部の周囲に配置されステータ部となるコアと、前記コアに巻回された巻線と、前記コアと前記巻線との間に配置されたコアカバーと、を有するモータにおいて、
前記コアは、円環状のヨークと、前記ヨークから中心方向に向かって延びた複数の極歯と、前記極歯先端から円周方向に延びた鍔部を備え、
前記巻線は、前記極歯に巻回されており、
前記コアカバーは、前記極歯間に形成されたスロットに挿入される挿入部を有し、
前記挿入部は、前記ヨークを被覆するヨーク被覆部と、前記極歯を被覆する極歯被覆部と、前記鍔部を被覆する鍔被覆部を有し、
前記鍔部を被覆する前記鍔被覆部のスロット開口部側の円周方向端辺は、当該鍔被覆部のスロット開口部側の上辺の端点よりも、円周方向において、常に当該鍔部に接する前記極歯側にあることを特徴とするものである。 Another embodiment of the invention comprises:
A motor having a core that is arranged around a rotor section and serves as a stator section, windings that are wound around the core, and a core cover that is arranged between the core and the windings,
the core includes an annular yoke, a plurality of pole teeth extending from the yoke toward the center, and a flange extending circumferentially from the tip of the pole tooth,
The winding is wound on the pole tooth,
The core cover has an insertion portion inserted into a slot formed between the pole teeth,
The insertion portion has a yoke covering portion that covers the yoke, a pole tooth covering portion that covers the pole teeth, and a flange covering portion that covers the flange portion,
The circumferential edge of the flange covering portion on the slot opening side that covers the flange portion is always in contact with the flange portion in the circumferential direction, rather than the end point of the upper side of the flange covering portion on the slot opening side. It is characterized by being on the pole tooth side.

本発明のモータは、コアカバーの鍔被覆部の円周方向端辺が、当該鍔被覆部の上辺の端点よりも常に極歯側にある構造となっているため、巻線の引っかかりや巻線の巻き込みを防止することができ、生産性および絶縁性が向上する。 In the motor of the present invention, the circumferential edge of the covered collar portion of the core cover is always closer to the pole teeth than the end point of the upper side of the covered collar portion. entrainment can be prevented, and productivity and insulation are improved.

本発明の第１の実施形態に係るモータの構成を示す断面図である。It is a sectional view showing composition of a motor concerning a 1st embodiment of the present invention. （ａ）は本発明の第１の実施形態に関わるロータ部の構成を示す斜視図であり、（ｂ）は本発明の第１の実施形態に関わるコアカバーの斜視図である。(a) is a perspective view showing the configuration of a rotor portion according to the first embodiment of the present invention, and (b) is a perspective view of a core cover according to the first embodiment of the present invention. 図２（ａ）に示したロータ部の構成を示す断面図である。FIG. 3 is a cross-sectional view showing the configuration of the rotor portion shown in FIG. 2(a); 図３におけるＡ－Ａ断面図である。FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3; 図３におけるＢ－Ｂ断面図である。FIG. 4 is a cross-sectional view taken along the line BB in FIG. 3; 上下方向からコアカバーを挿入し互いに近接させるように構成した際の図３におけるＡ－Ａ断面図である。FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3 when core covers are inserted from above and below and brought close to each other; （ａ）は図２（ｂ）のコアカバーの挿入部の下辺のコア側に面取りを施した際の斜視図であり、（ｂ）はさらに鍔被覆部の円周方向端辺の反コア側に面取りを施した際の斜視図である。(a) is a perspective view when chamfering is performed on the core side of the lower side of the insertion portion of the core cover in FIG. It is a perspective view at the time of chamfering. 本発明の第２の実施形態に係るモータの構成を示す断面図である。FIG. 6 is a cross-sectional view showing the configuration of a motor according to a second embodiment of the present invention; （ａ）は本発明の第２の実施形態に関わるステータ部の構成を示す斜視図であり、（ｂ）は本発明の第２の実施形態に関わるコアカバーの斜視図である。(a) is a perspective view showing the configuration of a stator portion according to a second embodiment of the present invention, and (b) is a perspective view of a core cover according to the second embodiment of the present invention. 図９（ａ）に示したステータ部の構成を示す断面図である。FIG. 10 is a cross-sectional view showing the configuration of the stator portion shown in FIG. 9(a); 図１０におけるＣ－Ｃ断面図である。FIG. 11 is a cross-sectional view taken along line CC in FIG. 10; 本発明の第１および第２の実施における鍔被覆部の他の形態を図示したものである。4A and 4B illustrate other forms of the brim covering portion in the first and second embodiments of the present invention; （ａ）は従来の実施例に関わるロータ部の構成を示す斜視図であり、（ｂ）は従来の実施例に関わるコアカバーの斜視図である。(a) is a perspective view showing the configuration of a rotor portion according to a conventional example, and (b) is a perspective view of a core cover according to a conventional example.

本明細書では、図２（ａ）および図８において中心軸と平行な方向を「軸方向」と呼び、中心軸を中心とする径方向を「径方向」と呼び、中心軸を中心とする円周方向を「円周方向」と呼ぶ。図２（ｂ）、図４および図９（ｂ）、図１１においてコアカバーが挿入される方向を「挿入方向」とし、挿入される側を「下側」、巻線端側を「上側」と呼ぶ。 In this specification, in FIGS. 2A and 8, the direction parallel to the central axis is called the "axial direction", and the radial direction centered on the central axis is called the "radial direction". The circumferential direction is called the "circumferential direction". 2(b), 4, 9(b), and 11, the direction in which the core cover is inserted is defined as "insertion direction", the inserted side is "lower side", and the winding end side is "upper side". call.

以下、図面に基づいて本発明の実施形態を例示的に説明する。 An embodiment of the present invention will be exemplified below based on the drawings.

（第１の実施形態）
本発明の第１の実施形態に係るモータを図１から図７を用いて説明する。モータ１は、中心軸２と、コア１１と、巻線３０と、コア１１と巻線３０の間に挿入されたコアカバー２０と、界磁マグネット３と、界磁部４とを有する。 (First embodiment)
A motor according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG. The motor 1 has a central shaft 2 , a core 11 , a winding 30 , a core cover 20 inserted between the core 11 and the winding 30 , a field magnet 3 and a field part 4 .

コア１１は、中心軸２の周囲に配置される。コア１１は磁性体から成り、中心軸２を覆うように形成された中心部１２と、中心部１２から径方向に向かって放射状に延びた複数の極歯１３と、極歯１３の先端から円周方向に延びた鍔部１４を有する。極歯１３の間にはスロット１５が形成され、鍔部１４の間にはスロットの開口部１５ａが形成されている。 Core 11 is arranged around central axis 2 . The core 11 is made of a magnetic material, and includes a central portion 12 formed so as to cover the central shaft 2, a plurality of pole teeth 13 radially extending from the central portion 12, and circular teeth extending from the tips of the pole teeth 13. It has a collar portion 14 extending in the circumferential direction. A slot 15 is formed between the pole teeth 13, and a slot opening 15a is formed between the flanges 14. As shown in FIG.

コアカバー２０は、スロット１５に挿入される挿入部２１を有している。この挿入部２１は、中心被覆部２２と、中心被覆部２２から径方向に放射状に延びる複数の極歯被覆部２３と、極歯被覆部２３の先端から円周方向に延びる鍔被覆部２４を備えている。 The core cover 20 has an insert portion 21 that is inserted into the slot 15 . The insertion portion 21 includes a central covering portion 22, a plurality of pole tooth covering portions 23 radially extending from the central covering portion 22, and a collar covering portion 24 extending circumferentially from the tip of the pole tooth covering portion 23. I have.

コアカバー２０の挿入部２１がコア１１の上下のコイルエンド面１６の両側からスロット１５に挿入されることにより、コアカバー２０はコア１１に係合される。これにより、コア１１の中心部１２と極歯１３と鍔部１４は、それぞれ中心被覆部２２と極歯被覆部２３と鍔被覆部２４によって覆われる。 The core cover 20 is engaged with the core 11 by inserting the insertion portions 21 of the core cover 20 into the slots 15 from both sides of the upper and lower coil end surfaces 16 of the core 11 . Thereby, the center portion 12, the pole tooth 13 and the flange portion 14 of the core 11 are covered with the center covering portion 22, the pole tooth covering portion 23 and the flange covering portion 24, respectively.

巻線３０は、コアカバー２０を介してコア１１の複数の極歯１３に巻き回される。なお、図３では１つの極歯１３に巻き回された巻線３０だけを示し、その他は省略している。 A winding 30 is wound around the plurality of pole teeth 13 of the core 11 via the core cover 20 . Note that FIG. 3 shows only the winding 30 wound around one pole tooth 13, and the others are omitted.

図４は図３に示したロータ部１０のＡ－Ａ断面図である。コア１１の鍔部１４をコアカバー２０の鍔被覆部２４が覆っている。鍔被覆部２４の円周方向端辺２７は、上辺２６の端点２６ａから下辺２５の端点２５ａの間で斜めになっており、上辺の端点２６ａよりも極歯１３の側にある構成になっている。コアカバー２０の可撓性は下側にいくほど大きくなるので、下側に行くほどに鍔部１４の端辺１４ａから離れるような構造とすることで、鍔部１４と鍔被覆部の円周方向端辺２７の間に生じる段差あるいは隙間の影響を小さくすることができる。 FIG. 4 is a cross-sectional view of the rotor portion 10 shown in FIG. 3 taken along the line AA. A flange covering portion 24 of the core cover 20 covers the flange portion 14 of the core 11 . A circumferential end side 27 of the collar covering portion 24 is inclined between an end point 26a of the upper side 26 and an end point 25a of the lower side 25, and is closer to the pole tooth 13 than the end point 26a of the upper side. there is Since the flexibility of the core cover 20 increases as it goes downward, by adopting a structure in which it moves further away from the edge 14a of the collar 14 as it goes downward, the circumference of the collar 14 and the collar covering portion is increased. The influence of steps or gaps between the directional edges 27 can be reduced.

このように構成することで、巻線３０が極歯１３および極歯被覆部２３への巻線時、スロット開口部１５ａから巻線が導入される際に、鍔被覆部の円周方向端辺２７に巻線が引っかかる可能性が低くなり、生産性が向上する。また、鍔被覆部２４に巻線を巻き込むことがなくなるため絶縁性も向上する。 With this configuration, when the winding 30 is wound around the pole tooth 13 and the pole tooth covering portion 23, when the winding is introduced from the slot opening 15a, the circumferential edge of the flange covering portion The winding is less likely to get caught on 27, improving productivity. In addition, since the coil is not wound in the brim covering portion 24, insulation is improved.

また、上述の実施形態において、鍔被覆部の上辺の端点２６ａは鍔部の上側の端点１４ｂと略同一の位置にあるのがよい。このようにすることで、鍔被覆部２４が鍔部１４を覆う領域が広くなり、より多くの巻線を巻き回すことができる。 Further, in the above-described embodiment, the end point 26a on the upper side of the collar covering portion is preferably at substantially the same position as the upper end point 14b of the collar portion. By doing so, the region where the collar covering portion 24 covers the collar portion 14 is widened, and more windings can be wound.

図５は図３に示したロータ部１０のＢ－Ｂ断面図である。鍔被覆部の下辺の端点２５ａは、巻線の最外周３１よりも鍔部端辺１４ａの側にあるとよい。このようにすることで、鍔被覆部の下辺２５から巻線がはみ出すことがなくなるため絶縁性の低下を抑えることができる。 FIG. 5 is a BB cross-sectional view of the rotor portion 10 shown in FIG. The end point 25a of the lower side of the collar covering portion is preferably closer to the collar portion edge side 14a than the outermost circumference 31 of the winding. By doing so, the winding does not protrude from the lower side 25 of the brim covering portion, so that deterioration of insulation can be suppressed.

また、上述の実施形態おいて、図６に示すように、コア１１の上下方向から挿入された二つのコアカバー２０の上辺２６および下辺２５がともに水平であり、かつ、二つの下辺２５が近接しているとよい。このようにすると、２つのコアカバー２０の間の空隙２８が極狭となり、絶縁性が向上する。 In the above-described embodiment, as shown in FIG. 6, the upper side 26 and the lower side 25 of the two core covers 20 inserted vertically into the core 11 are both horizontal, and the two lower sides 25 are close to each other. I hope you are. By doing so, the gap 28 between the two core covers 20 becomes extremely narrow, and the insulation improves.

また、上述の実施形態において、図７（ａ）に示すようにコアカバー２０の挿入部２１が、コア側に面取２１ａを形成した構造になっているとよい。このようにすることで、コアカバー２０をスロット１５に挿入する作業が容易となり、作業性が向上する。 In the above-described embodiment, as shown in FIG. 7A, the insertion portion 21 of the core cover 20 preferably has a structure in which a chamfer 21a is formed on the core side. By doing so, the work of inserting the core cover 20 into the slot 15 is facilitated, and workability is improved.

また、上述の実施形態において、図７（ｂ）に示すようにコアカバー２０の鍔被覆部２４の円周方向端辺２７が、反コア側に面取２７ｂを形成した構造になっているとよい。このようにすると鍔被覆部２４の円周方向端辺２７で段差が小さくなり、巻線がさらに引っかかりにくくなり、作業性が向上する。 In the above-described embodiment, as shown in FIG. 7B, the circumferential edge 27 of the collar covering portion 24 of the core cover 20 has a structure in which a chamfer 27b is formed on the side opposite to the core. good. By doing so, the step at the circumferential edge 27 of the collar covering portion 24 is reduced, and the winding is less likely to get caught, thereby improving workability.

また、上述の実施例では、鍔被覆部の下辺の端点２５ａから上辺の端点２６ａまでは直線状であったが、本発明はこれに限らず、例えば、図１２（ａ）に示すような円弧状であってもよく、また図１２（ｂ）に示したような段状であってもよい。鍔被覆部の円周方向端辺２７が上辺部の端点２６ａより極歯１３の側にあればよく、２５ａ－２６ａ間の形状には左右されない。 Further, in the above-described embodiment, the line from the end point 25a of the lower side of the collar covering portion to the end point 26a of the upper side is linear, but the present invention is not limited to this. It may be arcuate, or stepped as shown in FIG. 12(b). It is sufficient that the circumferential edge 27 of the collar covering portion is closer to the pole tooth 13 than the end point 26a of the upper edge, and the shape between 25a and 26a does not matter.

（第２の実施形態）
本発明の第２の実施形態に係るモータを図８から図１１を用いて説明する。モータ４０は、中心軸４２とロータ部４１と、ロータ部周辺にステータとなるコア５１と、巻線３０と、コア５１と巻線３０の間に挿入されたコアカバー６０とを有する。 (Second embodiment)
A motor according to a second embodiment of the present invention will be described with reference to FIGS. 8 to 11. FIG. The motor 40 has a central shaft 42 , a rotor portion 41 , a core 51 serving as a stator around the rotor portion, windings 30 , and a core cover 60 inserted between the cores 51 and 30 .

コア５１は、ロータ部４１の周囲に配置される。コア５１は磁性体から成り、周囲を囲むように形成された円環状のヨーク５２と、ヨーク５２から中心方向に向かって延びた複数の極歯５３と極歯５３の先端から円周方向に延びた鍔部５４を有する。極歯５３の間にはスロット５５が形成され、鍔部５４の間にはスロットの開口部５５ａが形成されている。 The core 51 is arranged around the rotor portion 41 . The core 51 is made of a magnetic material, and includes an annular yoke 52 formed to surround the periphery, a plurality of pole teeth 53 extending from the yoke 52 toward the center, and the ends of the pole teeth 53 extending in the circumferential direction. It has a collar portion 54 . A slot 55 is formed between the pole teeth 53, and a slot opening 55a is formed between the flanges 54. As shown in FIG.

コアカバー６０は、スロット５５に挿入される挿入部６１を有している。この挿入部６１は、ヨーク被覆部６２と、ヨーク被覆部から中心方向に向かって延びる複数の極歯被覆部６３と、極歯被覆部６３の先端から円周方向に延びる鍔被覆部６４を備えている。 The core cover 60 has an insertion portion 61 that is inserted into the slot 55 . The insertion portion 61 includes a yoke covering portion 62, a plurality of pole tooth covering portions 63 extending from the yoke covering portion toward the center, and a flange covering portion 64 extending from the tip of the pole tooth covering portion 63 in the circumferential direction. ing.

コアカバー６０の挿入部６１がコア５１の上下のコイルエンド面５６の両側からスロット５５に挿入されることにより、コアカバー６０はコア５１に係合される。これにより、コア５１のヨーク５２と極歯５３と鍔部５４は、それぞれヨーク被覆部６２と極歯被覆部６３と鍔被覆部６４によって覆われる。 The core cover 60 is engaged with the core 51 by inserting the insertion portions 61 of the core cover 60 into the slots 55 from both sides of the upper and lower coil end surfaces 56 of the core 51 . As a result, the yoke 52, the pole tooth 53, and the flange 54 of the core 51 are covered with the yoke covering portion 62, the pole tooth covering portion 63, and the flange covering portion 64, respectively.

巻線３０は、コアカバー６０を介してコア５１の複数の極歯５３に巻き回される。なお、図１０では１つの極歯５３に巻き回された巻線３０だけを示し、その他は省略している。 The winding 30 is wound around the plurality of pole teeth 53 of the core 51 via the core cover 60 . Note that FIG. 10 shows only the winding 30 wound around one pole tooth 53, and the others are omitted.

図１１は図１０に示したステータ部５０のＣ－Ｃ断面図である。コア５１の鍔部５４をコアカバー６０の鍔被覆部６４が覆っている。鍔被覆部６４の円周方向端辺６７は上辺６６の端点６６ａから下辺６５の端点６５ａの間で斜めになっており、上辺の端点６６ａよりも極歯５３の側にある構成になっている。コアカバー６０の可撓性は下側にいくほど大きくなるので、下側に行くほどに鍔部５４の端辺５４ａから離れるような構造とすることで、鍔部５４と鍔被覆部の円周方向端辺６７の間に生じる段差あるいは隙間の影響を小さくすることができる。 FIG. 11 is a CC cross-sectional view of the stator portion 50 shown in FIG. The collar portion 54 of the core 51 is covered with the collar covering portion 64 of the core cover 60 . A circumferential edge 67 of the collar covering portion 64 is inclined between an end point 66a of the upper side 66 and an end point 65a of the lower side 65, and is located closer to the pole tooth 53 than the end point 66a of the upper side. . Since the flexibility of the core cover 60 increases as it goes downward, by adopting a structure in which it moves away from the edge 54a of the collar portion 54 as it goes downward, the circumference of the collar portion 54 and the collar covering portion is increased. The influence of steps or gaps between the directional edges 67 can be reduced.

このように構成することで、巻線３０が極歯５３および極歯被覆部６３への巻線時、スロット開口部５５ａから巻線が導入される際に、鍔被覆部の円周方向端辺６７に巻線が引っかかる可能性が低くなり、生産性が向上する。また、鍔被覆部６４に巻線を巻き込むことがなくなるため絶縁性も向上する。 With this configuration, when the winding wire 30 is wound on the pole tooth 53 and the pole tooth covering portion 63, when the winding wire is introduced from the slot opening 55a, the circumferential edge of the flange covering portion The winding is less likely to get caught on 67, improving productivity. In addition, since the coil is not wound in the collar covering portion 64, insulation is improved.

また、この第２の実施例における鍔部５４と鍔被覆部６４の構成は、第１の実施例における鍔部１４と鍔被覆部２４の構成と全く同一であるため、第１の実施例における構成が同様に成り立つ。 Further, the structures of the flange portion 54 and the flange covering portion 64 in the second embodiment are completely the same as the structures of the flange portion 14 and the flange covering portion 24 in the first embodiment. The configuration holds similarly.

第２の実施形態において、鍔被覆部の上辺の端点６６ａは鍔部の端点５４ｂと略同一の位置にあるのがよい。このようにすることで、鍔被覆部６４が鍔部５４を覆う領域が広くなり、より多くの巻線を巻き回すことができる。 In the second embodiment, the end point 66a of the upper side of the collar covering portion is preferably at substantially the same position as the end point 54b of the collar portion. By doing so, the region where the collar covering portion 64 covers the collar portion 54 is widened, and more windings can be wound.

また、第２の実施形態において、鍔被覆部の下辺の端点６５ａは、巻線の最外周３１よりも鍔部端辺５４ａの側にあるとよい。このようにすることで、鍔被覆部の下辺６５から巻線がはみ出すことがなくなるため絶縁性の低下を抑えることができる。 Further, in the second embodiment, the end point 65a of the lower side of the collar covering portion is preferably located closer to the collar portion edge 54a than the outermost circumference 31 of the winding. By doing so, the winding does not protrude from the lower side 65 of the brim covering portion, so that deterioration of insulation can be suppressed.

また、第２の実施形態において、ステータの上下方向から挿入された二つのコアカバー６０の上辺６６および下辺６５がともに水平であり、かつ、二つの下辺６５が近接しているとよい。このようにすると、２つのコアカバー同士のすき間が極狭となり、絶縁性が向上する。 Moreover, in the second embodiment, it is preferable that both the upper side 66 and the lower side 65 of the two core covers 60 inserted from above and below the stator are horizontal and that the two lower sides 65 are close to each other. By doing so, the gap between the two core covers becomes very narrow, and the insulation improves.

また、第２の実施形態において、コアカバー６０の挿入部６１が、コア側に面取を形成した構造になっているとよい。このようにすることで、コアカバー６０をスロット５５に挿入する作業が容易となり、作業性が向上する。 Further, in the second embodiment, it is preferable that the insertion portion 61 of the core cover 60 has a structure in which the core side is chamfered. By doing so, the work of inserting the core cover 60 into the slot 55 is facilitated, and workability is improved.

また、第２の実施形態において、コアカバー６０の鍔被覆部６４の円周方向端辺６７が、反コア側が面取りされた構造になっているとよい。このようにすると鍔被覆部６４の円周方向端辺６７での段差が小さくなり、巻線がさらに引っかかりにくくなり、作業性が向上する。 In the second embodiment, it is preferable that the circumferential edge 67 of the brim covering portion 64 of the core cover 60 is chamfered on the side opposite to the core. By doing so, the difference in level at the circumferential edge 67 of the collar covering portion 64 is reduced, the winding is less likely to be caught, and workability is improved.

また、第２の実施形態では、下辺の端点６５ａから上辺の端点６６ａまでは直線状であったが、本発明はこれに限らず、例えば、図１２（ａ）に示すような円弧状であってもよく、また図１２（ｂ）に示したような段状であってもよい。鍔被覆部の円周方向端辺６７が上辺の端点６６ａより極歯５３の側にあればよく、６５ａ－６６ａ間の形状には左右されない。 Further, in the second embodiment, the line from the end point 65a of the lower side to the end point 66a of the upper side is linear, but the present invention is not limited to this. Alternatively, it may be stepped as shown in FIG. 12(b). It is sufficient that the circumferential edge 67 of the collar covering portion is closer to the pole tooth 53 than the end point 66a of the upper edge, regardless of the shape between 65a and 66a.

以上、本発明の実施形態について説明したが、本発明は、上述に限定されるものではなく、その主旨を逸脱しない範囲内において上述以外にも種々変形して実施することが可能である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above, and various modifications other than those described above can be made without departing from the gist of the present invention.

１モータ
２中心軸
３界磁マグネット
４界磁部
１０ロータ部
１１コア
１２中心部
１３極歯
１４鍔部
１４ａ鍔部端辺
１４ｂ鍔部の上側の端点
１５スロット
１５ａスロット開口部
１６コイルエンド面
２０コアカバー
２１挿入部
２１ａ挿入部の面取り
２２中心被覆部
２３極歯被覆部
２４鍔被覆部
２５鍔被覆部の下辺
２５ａ鍔被覆部の下辺の端点
２６鍔被覆部の上辺
２６ａ鍔被覆部の上辺の端点
２７鍔被覆部の円周方向端辺
２７ｂ端辺の面取り
２８２つのコアカバー間の空隙
３０巻線
３１巻線の最外周
４０モータ
４１ロータ部
４２中心軸
５０ステータ部
５１コア
５２ヨーク
５３極歯
５４鍔部
５４ａ鍔部端辺
５４ｂ鍔部端辺の端点
５５スロット
５５ａスロットの開口部
５６コイルエンド面
５８中心軸
５９ロータ部
６０コアカバー
６１挿入部
６２ヨーク被覆部
６３極歯保護部
６４鍔保護部
６５鍔被覆部の下辺
６５ａ鍔被覆部の下辺の端点
６６鍔被覆部の上辺
６６ａ鍔被覆部の上辺の端点
６７鍔被覆部の円周方向端辺
８０コア
８１中心軸
８２極歯
８３鍔部
８３ａ鍔部の端辺
９０コアカバー
９１挿入部
９２中心被覆部
９３極歯被覆部
９４鍔被覆部
９４ａ鍔被覆部端辺 Reference Signs List 1 motor 2 central shaft 3 field magnet 4 field part 10 rotor part 11 core 12 central part 13 pole tooth 14 flange 14a flange edge 14b upper end point of flange 15 slot 15a slot opening 16 coil end surface 20 Core cover 21 Insertion portion 21a Chamfer of insertion portion 22 Center covering portion 23 Pole tooth covering portion 24 Collar covering portion 25 Lower side of collar covering portion 25a End point of lower side of collar covering portion 26 Upper side of covering collar portion 26a Upper side of covering collar portion End point 27 Circumferential direction edge of flange covering portion 27b Chamfering of edge 28 Gap between two core covers 30 Winding 31 Outermost circumference of winding 40 Motor 41 Rotor 42 Center shaft 50 Stator 51 Core 52 Yoke 53 Poles Tooth 54 Flange 54a Flange edge 54b Flange edge end point 55 Slot 55a Slot opening 56 Coil end surface 58 Central axis 59 Rotor section 60 Core cover 61 Insertion section 62 Yoke covering section 63 Pole tooth protection section 64 Flange Protective part 65 Lower side of collar covering part 65a End point of lower side of collar covering part 66 Upper side of collar covering part 66a End point of upper side of collar covering part 67 Circumferential direction edge of collar covering part 80 Core 81 Central axis 82 Pole tooth 83 Collar Part 83a Edge of flange 90 Core cover 91 Insertion part
92 Center covering portion 93 Pole tooth covering portion
94 Covered collar portion 94a Covered collar portion edge

Claims

A motor having a core serving as a rotor portion or a stator portion arranged around a central axis, windings wound around the core, and a core cover arranged between the core and the windings ,
The core includes a central portion formed to cover the central axis, a plurality of pole teeth radially extending from the central portion, and a flange extending circumferentially from the tip of the pole tooth. with
The winding is wound on the pole tooth,
The core cover has an insertion portion inserted into a slot formed between the pole teeth,
The insertion portion has a center covering portion that covers the center portion, a pole tooth covering portion that covers the pole teeth, and a flange covering portion that covers the flange portion,
The circumferential edge of the flange covering portion on the slot opening side that covers the flange portion is always in contact with the flange portion in the circumferential direction, rather than the end point of the upper side of the flange covering portion on the slot opening side. It is characterized by being on the pole tooth side.

A motor having a core that is arranged around a rotor section and serves as a stator section, windings that are wound around the core, and a core cover that is arranged between the core and the windings,
the core includes an annular yoke, a plurality of pole teeth extending from the yoke toward the center, and a flange extending circumferentially from the tip of the pole tooth,
The winding is wound on the pole tooth,
The core cover has an insertion portion inserted into a slot formed between the pole teeth,
The insertion portion has a yoke covering portion that covers the yoke, a pole tooth covering portion that covers the pole teeth, and a flange covering portion that covers the flange portion,
The circumferential edge of the flange covering portion on the slot opening side that covers the flange portion is always in contact with the flange portion in the circumferential direction, rather than the end point of the upper side of the flange covering portion on the slot opening side. It is characterized by being on the pole tooth side.

2. A structure according to claim 1, characterized in that the circumferential edge of said collar cover part is separated in the circumferential direction from the circumferential edge of said collar part toward the lower side of said collar cover part. A motor according to claim 2.

4. The motor according to any one of claims 1 to 3, wherein an end point of the upper side of said collar covering portion is located at substantially the same position as an end point of said collar portion.

5. The motor according to any one of claims 1 to 4, wherein an end point of the lower side of the collar covering portion is located closer to the edge side of the collar portion in the circumferential direction than the outermost circumference of the winding.

6. The motor according to claim 1, wherein the upper side and lower side of said core cover are horizontal.

7. The motor according to claim 6, wherein the lower sides of the two core covers inserted from above and below the core are close to each other.

The motor according to any one of claims 1 to 7, wherein the lower side of the insertion portion has a structure in which the core side is chamfered.

9. The motor according to any one of claims 1 to 8, wherein the circumferential edge of said flange covering portion is chamfered on the side opposite to the core.